Simple and probably not overly hygienic since soap is only applied directly to the outside surface, but hell if you scrub enough and rinse enough it should be fresher coming out than when it went in. Since the GRADE is a new style the window of opportunity to put the full 6-months worth of miles on them before washing was restricted. But the model is also a heritage-design and benefits a little from shrink-back once it's stretched out in the first few weeks. Not exactly shrink-to-fit. More like a shot of botox or a modest tuck to get things back closer to where they started.We chose the South of France for the experiment. It's a dirty job but somebody had to try it.
